A man holding a compass in nature
Physics

The Discovery of Magnet and Magnetic Compass

May 17, 2021

The magnetic compass has a magnetically aligned needle that swings around a pivot point to indicate north and south poles. This tool was instrumental in world discoveries. It was also key to exploring the nature of magnetic forces. […]

Diagram of a heat engine converting heat to mechanical work.
Physics

On the Conversion of Heat into Mechanical Work

May 5, 2021

Nicolas Carnot’s improvement of the steam engine was remarkable and praiseworthy. He also derived a mathematical equation for efficiency that is used today to calculate the maximum efficiency of any engine. […]

An image of a thermometer.
Physics

An Introduction to the Second Law of Thermodynamics

May 5, 2021

In contrast to the first law of thermodynamics (the amount of energy can be changed as many times as possible), the second law of thermodynamics puts many restrictions on how energy/heat is utilized (there are only three different heat motions). […]

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